3GPP Long Term Evolution LTE and System Architecture Evolution ...

1. 3GPP Long Term Evolution (LTE) and System Architecture Evolution (SAE)

4. Structure of 3GPP

5. 3GPP Release Timeline

6. 3G Evolution Radio Side (LTE � Long Term Evolution) Improvements in spectral efficiency, user throughput, latency Simplification of the radio network Efficient support of packet based services: MBMS, IMS, etc. Network Side (SAE � System Architecture Evolution) Improvement in latency, capacity, throughput Simplification of the core network Optimization for IP traffic and services Simplified support and handover to non-3GPP access technologies

7. Evolution of 3GPP Radio Rates 

8. LTE (Long Term Evolution)  LTE focus is on: enhancement of the Universal Terrestrial Radio Access (UTRA) optimisation of the UTRAN architecture With HSPA (downlink and uplink), UTRA will remain highly competitive for several years LTE project aims to ensure the continued competitiveness of the 3GPP technologies for the future

9. LTE Requirements (1) Reduced cost per bit Improve spectrum efficiency ( e.g. 2-4 x Rel6) Reduce cost of backhaul (transmission in UTRAN) Increased service provisioning � more services at lower cost with better user experience Focus on delivery of services utilising �IP� Reduce setup time and round trip time Increase the support of QoS for the various types of services (e.g. Voice over IP) Increase �cell edge bit rate� whilst maintaining same site locations as deployed today Increase peak bit rate (e.g. above 100Mbps DL and above 50Mbps UL) Enhance the bit rate for MBMS (e.g. 1-3 Mbps) Allow for reasonable terminal power consumption

10. LTE Requirements (2) Flexibility of use of existing and new frequency bands Allow to deploy in wider and smaller bandwidths than 5 MHz ( e.g. ranging from 1.25 to 20MHz) Allow variable duplex technology within bands as well as between bands Non-contiguous spectrum allocations to one UE should not be precluded

11. LTE Requirements (3) Architecture and Mobility Need to consider UTRAN Evolution and UTRA Evolution at the same time aiming at simplifying the current architecture Shall provide open interfaces to support Multi-vendor deployments Consider robustness � no single point of failure Support multi-RAT with resources controlled from the network Support of seamless mobility to legacy systems as well as to other emerging systems including inter RAT Handovers and Service based RAT Selection Maintain appropriate level of security

12. LTE Key agreements (1) 2 main issues have been investigated: The physical layer The access network internal architecture Physical layer Downlink based on OFDMA OFDMA offers improved spectral efficiency, capacity etc Uplink based on SC-FDMA SC-FDMA is technically similar to OFDMA but is better suited for uplink from hand-held devices (battery power considerations) For both FDD and TDD modes (User Equipment to support both) With Similar framing + an option for TD SCDMA framing also Access Network consideration For the access network it was agreed to get rid of the RNC which minimized the number of nodes

13. LTE Architecture

14. LTE Key agreements (2) On the UTRAN Architecture the following working assumptions were agreed in TSG RAN: RRC Terminates in the eNode B Outer ARQ terminates also in the eNode B Currently Ciphering and integrity for signaling is inside the eNode B while Ciphering for the User plane is in the AGW

15. LTE Key agreements (3) Requirements satisfaction The LTE concept has the potential to fulfil both the system capacity and user throughput targets Evaluated uplink peak data rate is a bit smaller than the requirements, however, it is expected that the peak data rate can be increased by some optimisations, e.g. higher TTI values and/or by reducing the amount of control signalling information. It was confirmed that the requirements of C-plane and U-plane latency can be satisfied. Fulfilments without any issues are identified for requirements on deployment scenarios, spectrum flexibility, interworking, mobility, E-UTRAN architecture and RRM.

16. LTE Key agreements (4) Regarding system and device cost and complexity work needs to continue in the future. As evolved UTRA and UTRAN system will provide significantly higher data rates than Release 6 WCDMA and, as a consequence hereof, the physical layer complexity will increase accordingly compared to lower-rate systems. This complexity is not seen as evolved UTRA and UTRAN specific, but is similar to the complexity experienced in any high data rate system. According to these evaluation results, it can be concluded that system concepts captured in this TR are feasible for evolved UTRA and UTRAN. For Broadcast/Multicast services it is assume that network synchronization will improve greatly the performance

17. Time schedule for LTE LTE plan endorsed by 3GPP Project Co-ordination Group Initial studies and work-plan creation to was almost completed in June 2006: Generic Work Item created during the June meeting of TSG RAN LTE Workplan created in September 2006 Completion foreseen in 2008

18. SAE (System Architecture Evolution) To ensure competitiveness of 3GPP systems for the next 10 years and beyond Optimization of the network for IP traffic and its expected growth Performance improvements reduced latency, higher user data rates, improved system capacity and coverage, and reduced overall cost for the operator. Potential network and traffic cost reduction Flexible accommodation and deployment of existing and new access technologies with mobility by a common IP-based network

19. 3GPP Packet Core architecture(SAE simplified, as of Sept 2006)

20. 3GPP SAE � status Large number of active companies (30+) Reasonable progress on 3GPP parts (including LTE support) As of October 2006, SA has given a directive to SA2 to ensure that LTE 3GPP access aspects can meet the time line required by 3GPP RAN Some Key areas being addressed � agreements remaining MME-UPE split or merged 3GPP anchor-SAE anchor split or merged Interconnection/mobility for non-3GPP access technologies Roaming aspects PCC architecture & QoS model Simultaneous access to multiple data networks Timeline Report to be ready for SA plenary approval Dec 2006 Majority of Specifications to be ready end 2007/early 2008 First deployments planned for 2009

21. LTE/SAE time plan SA have drafted an overall SAE/LTE work plan to align the time schedules of all applicable Working Groups

22. Summary Extensive work ongoing to ensure future competiveness of 3G systems Improved performance Simplified architecture Optimized for IP traffic and services Support for non-3GPP access technologies Completion targeted in 2008 Study phase completing, specification phase starting Further information at 3GPP web site (www.3gpp.org) LTE requirements study: 25.913 LTE architecture study: 25.912 SAE architecture study: 23.882